Zztai Peptide: Lab Test Results
Independent Certificates of Analysis aggregated from public lab results. Not affiliated with or paid by Zztai Peptide.
41
CoAs on file
99.6%
Avg reported purity
5
Compounds tested
Sep 7, 2026
Latest test
Results by compound
| Compound | CoAs | Avg purity | Latest |
|---|---|---|---|
| Tirzepatide | 20 | 99.58% | Mar 25, 2026 |
| Retatrutide | 12 | 99.47% | Sep 7, 2026 |
| GHK-Cu | 4 | 99.89% | Feb 15, 2026 |
| Tesamorelin | 3 | 99.82% | Feb 20, 2026 |
| Melanotan II | 2 | 99.73% | Jan 6, 2026 |
Recent CoAs
| Compound | Batch | Purity | Lab | Tested | |
|---|---|---|---|---|---|
| Retatrutide | n/a | n/a | Lab G | Sep 7, 2026 | verify |
| Tirzepatide | n/a | 99.8% | Lab G | Mar 25, 2026 | verify |
| Retatrutide | 12/9/25-SS67 | 99.74% | Lab E | Feb 22, 2026 | verify |
| Tesamorelin | n/a | 99.9% | Lab E | Feb 20, 2026 | verify |
| Retatrutide | n/a | 99.5% | Lab G | Feb 15, 2026 | verify |
| Tesamorelin | n/a | 99.6% | Lab G | Feb 15, 2026 | verify |
| GHK-Cu | n/a | 99.7% | Lab G | Feb 15, 2026 | verify |
| GHK-Cu | n/a | 99.95% | Lab E | Jan 15, 2026 | verify |
| Tirzepatide | n/a | 99.95% | Lab E | Jan 9, 2026 | verify |
| Tesamorelin | n/a | 99.95% | Lab E | Jan 9, 2026 | verify |
| Retatrutide | n/a | 99.7% | Lab G | Jan 7, 2026 | verify |
| Tirzepatide | n/a | 99.7% | Lab G | Jan 7, 2026 | verify |
| GHK-Cu | n/a | 99.95% | Lab E | Jan 6, 2026 | verify |
| Melanotan II | n/a | 99.55% | Lab E | Jan 6, 2026 | verify |
| Tirzepatide | n/a | 99.8% | Lab G | Jan 1, 2026 | verify |
| Retatrutide | n/a | 99.7% | Lab G | Dec 16, 2025 | verify |
| Tirzepatide | Tr20(0) | 99.8% | Lab G | Dec 13, 2025 | verify |
| Tirzepatide | n/a | 99.7% | Lab G | Dec 13, 2025 | verify |
| GHK-Cu | n/a | 99.95% | Lab E | Nov 4, 2025 | verify |
| Tirzepatide | n/a | 99.7% | Lab G | Oct 30, 2025 | verify |
| Tirzepatide | n/a | 99.7% | Lab G | Oct 24, 2025 | verify |
| Tirzepatide | n/a | 99.92% | Lab E | Sep 18, 2025 | verify |
| Tirzepatide | n/a | 99.95% | Lab E | Sep 18, 2025 | verify |
| Retatrutide | n/a | 99.94% | Lab E | Sep 18, 2025 | verify |
| Retatrutide | n/a | 96.63% | Lab E | Sep 4, 2025 | verify |
Showing 25 most recent of 41. Search the full database on the CoA page.
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Data comes from publicly posted third-party lab certificates (Janoshik, MZ Biolabs, and others) and community submissions. Purity figures are as reported by the testing lab for the specific batch tested; they are not a guarantee of any other batch. For research and informational purposes only.